Dust-collector for vacuum-cleaners.



WlTNESSES F. S. R..PREN'1ISS. I DUST COLLECTOR FOR VACUUM CLEANERS. APPLICATION rump JUNE 2, 1911.

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NVEN'TO-R Q 'w izmdawgm 7am. QMW4 fili ATTORNEY IVS. R. PRENIISS. DUST COLLECTOR ron vacuum CLEANERS. APPLICATION FILED JUNE 2, 1911.

1 329,562, Patentd June 11,1912.

' 3 SHBBTSSHEET 2.

I 16' 19 18 lo I-'\ m v WITNESSES VENTOR p imam, 0%1/ ATTORNEY F. 8.1; PRENTISS.

DUST COLLECTOR FOB VACUUM CLEANERS APPLICATION FILED JUNE 2, 1911.

1,0293562. Patented June 11,1912.

3 SHEETS SHEET 3.

WITNESSES INVENTOR H65. C QM O W n BY I ATTORNEY UNITED STATES PATENT OFFICE.

"FRANK S. R. PRENTISS, OF SAN FRANCISCO, CALIFORNIA.

nu's'rgcoLLno'ron FOR VACUUM-CLEANERS.

Specificationof Letters Patent.

7 Application filed June 2, 1911. Serial No. 630,866; Y

T0 all -whom it mag concern:

Be 1t known that I, FRANK S. R. PRENTISS,

.citizen of the United States, residing at San Francisco, in the county of San Francisco and State. of California, have invented a new and useful Dust-Collector for Vacuum-' Cleaners, of which the following isa specification in such full and clear terms as will enable'those skilled in the art to'construct and use the Same.

This invention relates to a vacuum cleaner, audits object is to rovide means for the collection of dust gat ered by such a cleaner.

An object of the invention is to provide means for the collection of the dust in such a manner as to ,make possible the cleaning of the dust collecting chamber with as little disagreeable labor as possible.

A further object of theinvention is to provide a dust filter which will be so arranged as to avoid the collection thereon of .as much of the dust as can possibly 'be settled before the air passes through "the filter, thus in creasing the amount of dust that maybe col lectcd at any given time, Without decreasing the efi'ectiveness of the vacuum cleaner.

--Anotl a er object of the invention" is to provide an air filter which may be readily re moved frdm the machine and cleaned, or which may have another filter substituted thereforas desired, the receptacle for the dustbeing removable from the machine to be emptied.

. Other objects of theynvention will appear a as the description proceeds, I

. In the drawings in which the same nu-' meral of'reference isappljed to the same portion throughout the several views, Figure 1 is a sectional view (at a positive suction bellows apparatus illustrating thev filter applied thereto, F ig; 2 shows the filter when used in connection with a machine having .the casing over the lower portion of the suction apparatus only, the air filter lacing removable from the top of the casing,

is an eccentric 5. Each eccentric has a strap.

6. therearound,'-which strap is connected to the link 7 and, said link is connected at its upper end to a disk member 9/ This disk member has its edges beveled as: shown and is secured 'to a diaphragm 10, the latter be- PatentedJune 11, 1912.

ing connected at its periphery to the casings l1 and 16. The disk is provided with a plurality of holes l3-around itsedges, and it -hasf a leather disk 14 securedto its under side, said disk 14 being large enough to cover all of the holes and being'held injplaoe against the under side of said disk by means of a plate 15, said plate being about the di-' ameter of that portion of the disk between the holes 13. I

The upper portion of the machine is. formed with a casing 16 and said casing'has holes 17 in the bottom thereof, which holes are closed by means of a leather disk 18 substantially like the one on the underside of the movable disk, aplate 19 holding said leather disk in place. The twoplatesholding the leather disk in place are secured in their respective positions by means of a su it' able boltat the center thereof, as shown. 1

The cover 20 has a handle 21 and has an inlet pipe 22, said inlet pipe having anelbow within the dust-collecting compartment, which is so turned as to cause the'incomi'ng current of air to travel around the dust-collecting pan 23. The dust-collecting pan 23 I is removable from the machine, and 'is provided with a gasket 24 to make a tight joint with the upper edge of the casing. The

cover 20 is provided with three gaskets 25, 26 and 27 to make tight joints with the edges of the dust collecting compartments of the pan 23. The pan 23 has an inverted funnel shaped outlet 28 at the bottom thereof, and it is provided with two concentric inner rings29 and 30, communication being had from the outer compartment thus formed through elbows 31 and 32., I

The filter comprises a.wire cage 33 covered with cloth 31, which is secured to a base phate 35, the latter resting upon the nipple 28 and formingan air tight joint therewith, whereb v any dust failing to accumulate in the outer; spaces between the outside pan 33 and theainner pans 29 and 30, will be pre vented from passing through the suction} apparatus. v a

The cover 20 isheld in place on the top of the pan 23, and thef-an 23 held to the easing 16 by means of' suitgble hooks 36. Since it is sometimes desirable to use this form' of apparatus as a blowing machine rather than a suction machine, the lower casing 11 is provided with a flaring outlet'pipe 37,- with' which the suction hose,v or in this case the blowing hose, may be connected.

In order to determine the. amount of dust carried by the air passing through the machine, a window. 38 is provided 'inthe top of the inlet fixture 22.

Itwill be noted in Fig. 3 that the two elbows in the inner pans 29 and 30-face in reverse directions, the object being to retard the velocity of'the air as much as possible, when the same is passing through the machine, thus tending to precipitate all of the dust before it reaches the filter 34. An advantage of this type of machine lies in .the

- fact that theair filter requires'practica-lly nocleaning, nearly all" of the dust collecting in theouter compartments-of the. dust col lecting pan, but should the filter become too foul to continue in use, all that is necessary is to lift the same out-and -place anew filter in pos'tion, the old filterbeing cleaned in anysflitable manner at lei ure.,

In ig. 2 there is shown a slightlyginodir fied forin of the invention, in that the casing forming the pper part of ,the achine is cut'down so tat the outsideof t a an 23 serves in the place thereof. Otl'i'er ise in this form of the invention the apparatus is substantially 't-hesame as in the preceding form. In this the base 1' is provided with wheels 2' above which extends a casing 11 substantially the same as the casing used with the other machine. Within this is a disk 9',.operating link 7', and leather, an

nulus 10", the operati n being substantially the same as in the 0th r form of the invention shown. Above the casing 11 there is a casing 16 which extends" above the casing ll only high enough to afford suitable clearance for .the disk .9, disks 18' and 19' being secured to the diphragm 42 which extends'across the casing 16. The casing 16 is also provided with 'a flange 43 on which is seated agasket 44, and hooks hold the pan 23 in close contact with the casing 16".

The cover 20 of the machine is substantially identical with the cover shown in the other form of the invention, and it has an inlet pipe-22and handle 21 for moving the 'machine. from place to place. An advantage of thisforni of the invention lies in the. fact that all of t he metal forming the casin above'the top of the'pan; 23 is dispense with, thus reducing the weight of the machine very considerably, a great deside'ratum in 'machines to be handled by women.

what I claim as new an desire to secure by. Letters Patent- 0f the United States is as I follows 13 In-a dust. collector for vacnu mplean ers, a pan having a plurality of compartments therein and 'open'at the top, a. cover ments therein, said" pan having openings from one' compartment to another, means whereby the air passing from onecompartmerit to another will be directed around the several compartments, a\cover having means to make a substantially'air tight joint with each of said compartments, an air inlet pipe let-pipe in-the central compartment and a I dust filtersecured' on said stantially' as described. 7 I i 2. In a dust collector for vacuum pleaners, .a pan havinga plurality of compartthrough said cover and-adjacent the outer wall of said pan, an air out-let pipe-in the inner compartment and a dust filter supported upon said air outlet'pipe, substantially as described;

In testimony .whei eof I have-hereunto set my hand'this 11th day-'oEE May A. D. 1911, in the presence of the two subscribed witnesses. v

. FRANK S. R. PRENTISS. Witnesses:

' C. P. GRIFFIN,

L. C. Pmm'riss. I r I Having thus described my invention v 

